Blacklists Compared

2 September 2006

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
109503(total number of IP addresses tested, including 508 at SDSC)
102750(union of most IP zones)
83701t1.dnsbl.net.au
69334block.blars.org
62854dnsbl.sorbs.net (union of all results)
60559zen.spamhaus.org (union of all results)
60559sbl-xbl.spamhaus.org (union of all results)
60080xbl.spamhaus.org (union of all results)
58510cbl.abuseat.org
58485xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
58484zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
58484sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
55466blackholes.five-ten-sg.com (union of all results)
53997blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
50319dnsbl.sorbs.net (result 127.0.0.10 = dialup)
49797psbl.surriel.com
49212dnsbl.tqmcube.com (union of all results)
35455dynablock.njabl.org
29405no-more-funn.moensted.dk (union of all results)
24058dnsbl-2.uceprotect.net
22680dnsbl-1.uceprotect.net
22199dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
19780cn-kr.blackholes.us (result 127.0.0.2 = China)
19780cn-kr.blackholes.us (union of all results)
17081no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
16422bl.spamcop.net
13278china.blackholes.us
13136dnsbl.tqmcube.com (result 127.0.0.5 = China)
12904unconfirmed.dsbl.org
12792list.dsbl.org
12785dsbl.dnsbl.net.au
11531bl.csma.biz
11074dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10662blacklist.spambag.org
8566no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8044dnsbl.njabl.org (union of all results)
7976ubl.unsubscore.com
7926combined-hib.dnsiplists.completewhois.com (result 127.0.0.4 = bad whois data)
7926combined-hib.dnsiplists.completewhois.com (union of all results)
7848dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
6869korea.services.net
6626wpbl.dnsbl.net.au
6504korea.blackholes.us
6301dnsbl.njabl.org (result 127.0.0.9 = open proxy)
6059dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
5987dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4727brazil.blackholes.us
4579dnsbl.ahbl.org (union of all results)
4443zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4443xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4443sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4318dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3830rmst.dnsbl.net.au
3767unsure.nether.net
3485spamsources.fabel.dk
3415l2.spews.dnsbl.sorbs.net
3410spam.wytnij.to
3324no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3043l1.spews.dnsbl.sorbs.net
2962dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
2538argentina.blackholes.us
2189tr.countries.nerd.dk
2185turkey.blackholes.us
2167dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
2130mail-abuse.blacklist.jippg.org
1877mexico.blackholes.us
1669taiwan.blackholes.us
1651dnsbl-3.uceprotect.net
1486japan.blackholes.us
1418dnsbl.njabl.org (result 127.0.0.3 = dialup)
1413bl.spamcannibal.org
1225probes.dnsbl.net.au
812blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
745russia.blackholes.us
650ricn.dnsbl.net.au
627thailand.blackholes.us
574sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
574sbl.spamhaus.org
573zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
459malaysia.blackholes.us
408no-more-funn.moensted.dk (result 127.0.0.9 = misc)
354blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
326hongkong.blackholes.us
298no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
271sbl.csma.biz
261singapore.blackholes.us
248dnsbl.ahbl.org (result 127.0.0.4 = spam source)
245dnsbl.njabl.org (result 127.0.0.4 = spam source)
242blackholes.uceb.org (union of all results)
224blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
176blackholes.uceb.org (result 127.0.0.3 = spam source)
173dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
158work.drbl.croco.net
146dnsbl.antispam.or.id
143blackholes.intersil.net
139query.bondedsender.org (not a blacklist!)
99ohps.dnsbl.net.au
99dnsbl.njabl.org (result 127.0.0.2 = open relay)
91flowgoaway.com
75multihop.dsbl.org
68blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
63relays.ordb.org
55blackholes.uceb.org (result 127.0.0.5 = dialup)
51dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
36rdts.dnsbl.net.au
32osps.dnsbl.net.au
23relays.nether.net
19tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
19tor.dnsbl.sectoor.de (union of all results)
19spamguard.leadmon.net (union of all results)
17nigeria.blackholes.us
17spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
14hil.habeas.com
14exemptions.ahbl.org (not a blacklist!)
12multi.surbl.org
11blackholes.uceb.org (result 127.0.0.2 = open relay)
11dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
7blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
6owps.dnsbl.net.au
6dnsbl.ahbl.org (result 127.0.0.15 = open relay)
5osrs.dnsbl.net.au
5bl.deadbeef.com
3blackholes.brainerd.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
2dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.13 = challenge-response source)
1dnsbl.ahbl.org (result 127.0.0.17 = worm source)

The blackholes.intersil.net zone "lists entrenched spammers, mainsleaze and mainsleaze wannabes who have pestered users at Intersil." The flowgoaway.com zone lists FloNetwork systems.

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
109503(total number of IP addresses whose names were tested, including 508 at SDSC)
63665(union of all domain zones)
46706abuse.rfc-ignorant.org
46016rddn.dnsbl.net.au
33365dynamic.rhs.mailpolice.com
32776whois.rfc-ignorant.org (union of all results)
21617whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
11161whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3401webmail.rhs.mailpolice.com
679rhsbl.ahbl.org
501adv.rhs.mailpolice.com
332postmaster.rfc-ignorant.org
209multi.surbl.org
121bulk.rhs.mailpolice.com
91dsn.rfc-ignorant.org (zone not intended for this use)
91bogusmx.rfc-ignorant.org
1blackhole.securitysage.com
1porn.rhs.mailpolice.com
1fraud.rhs.mailpolice.com

Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
63343(total number of domains tested, including 421 at SDSC)
12755(union of all domain zones)
4765whois.rfc-ignorant.org (union of all results)
4091whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3789abuse.rfc-ignorant.org
1968multi.surbl.org
1739webmail.rhs.mailpolice.com
1491postmaster.rfc-ignorant.org
1099rhsbl.ahbl.org
1032dsn.rfc-ignorant.org
901bogusmx.rfc-ignorant.org
674whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
314porn.rhs.mailpolice.com
272bulk.rhs.mailpolice.com
185adv.rhs.mailpolice.com
171blackhole.securitysage.com
57rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
57rhsbl.sorbs.net (union of all results)
20rddn.dnsbl.net.au (zone not intended for this use)
14ex.dnsbl.org
5dynamic.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 September 2006.